[U-Boot] [linux-sunxi] Re: [RFC PATCH 0/3] sunxi: video: Add support for HDMI output on H3

[Alexander Graf]

> Am 14.12.2016 um 11:25 schrieb Maxime Ripard <maxime.ripard at free-electrons.com>:
> 
>> On Wed, Dec 14, 2016 at 11:02:33AM +0800, Chen-Yu Tsai wrote:
>>> On Wed, Dec 14, 2016 at 5:16 AM, Icenowy Zheng <icenowy at aosc.xyz> wrote:
>>> 
>>> 
>>> 14.12.2016, 04:29, "Simon Glass" <sjg at chromium.org>:
>>>> Hi,
>>>> 
>>>>> On 12 December 2016 at 19:36, Jernej Skrabec <jernej.skrabec at siol.net> wrote:
>>>>> This patch series add support for HDMI output. Support for other,
>>>>> newer, SoCs, which also uses DE2 and same or similar HDMI controller
>>>>> and PHY can be easily added later (A83T/A64/H5/R40). Current driver
>>>>> can also be easily extended with TV out support, just like video
>>>>> driver for older Allwinner SoCs.
>>>>> 
>>>>> While driver works, I would like to get few opinions first.
>>>>> - From what I understand, drivers which supports DT are preferred.
>>>>>   Would it be better to rewrite this driver to support device tree?
>>>> 
>>>> Yes I think so, and in fact it should use driver model also.
>>>> 
>>>> The rockchip driver provides a reasonable example of how to split the
>>>> driver up as you suggest below. The VIDEO driver provides the
>>>> top-level video interface, DISPLAY drivers provide display output for
>>>> the video, and you have PANEL as well for receiving the display
>>>> output. VIDCONSOLE works automatically to display text.
>>>> 
>>>> I actually took a bit of a look at this a few weeks ago so am happy to
>>>> help with review or discussions.
>>> 
>>> Yes, I think go to Driver Model is also valuable, as Allwinner's display parts
>>> are really in reusable components.
>>> 
>>> In addition, Driver Model provides the possibility to use EFI GOP, which can
>>> be a more standardized replacement of SimpleFB, especially for OSes other
>>> than Linux. (For example, Windows, if we can really get it running ;-) )
>> 
>> We're going to use EFI now? Doesn't EFI mean we have to leave another bit
>> of firmware in memory running under the OS? What about PSCI and ATF on
>> ARMv8?
> 
> Until EFI on A64 on U-boot is a real thing, I don't really care to be
> honest.

How is it not a real thing today?

Alex